②在热处理过程中，对照试材的重量损失率WL随着热处理时间的延长而增大，而且，WL与R之间呈近似线性负相关；

There exists an evident linear relationship between values of weight loss (WL) and corresponding time, and an evident negative relationship between WL and Rs ;

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②在热处理过程中，对照试材的重量损失率WL随着热处理时间的延长而增大，而且，WL与R之间呈近似线性负相关；

There exists an evident linear relationship between values of weight loss (WL) and corresponding time, and an evident negative relationship between WL and Rs ;

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